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MARK DEMEO M.D.
NPI 1972549327
Internal Medicine - Gastroenterology in Chicago, IL

Active since June 22, 2006PECOS EnrolledAccepts Medicare Assignment
1725 W HARRISON ST, SUITE 207, CHICAGO, IL 60612(312) 942-5861 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mark Demeo M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK DEMEO M.D. (NPI 1972549327) is an individual gastroenterology provider in Chicago, Illinois and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Copley Memorial Hospital, and is a graduate of Rutgers New Jersey Medical School (1983).

NPPES Registry Identity

NPI1972549327
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameMARK DEMEOCredential: M.D.
Location Address1725 W HARRISON ST, SUITE 207Chicago, IL 60612-3841
Mailing Address1725 W Harrison St, Suite 207Chicago, IL 60612-3841 · (312) 942-5861
Phone(312) 942-5861
Sole ProprietorNo
Medical School CMSRutgers New Jersey Medical SchoolGraduated 1983
Enumeration DateJune 22, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1972549327 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
1725 W HARRISON ST, Chicago, IL 60612
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Other Identifiers 2

Medicare UPIND16019IL
Medicare ID-Type UnspecifiedL72566IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mark Demeo M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID244224475
PECOS Enrollment IDI20040412000924
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
108 services108 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
100 services77 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
95 services81 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
87 services87 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
39 services39 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
30 services30 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Copley Memorial Hospital

Acute Care Hospitals · Aurora, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140029
Location2000 Ogden AvenueAurora, IL 60504 · Kane County
Emergency services Birthing friendly

Rush Oak Park Hospital

Acute Care Hospitals · Oak Park, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140063
Location520 S Maple AveOak Park, IL 60304 · Cook County
Emergency services

Rush University Medical Center

Acute Care Hospitals · Chicago, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140119
Location1653 West Congress ParkwayChicago, IL 60612 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60612 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Parenteral nutrition solution, not otherwise specified, 10 grams lipids B4185
Other-Enteral and Parenteral · category OB005N
4 suppliers35 claims1,190 services$11.02 avg. paid by Medicare
Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements and vitamins, including preparation, any strength, 74 to 100 grams of protein - premix B4197
Other-Enteral and Parenteral · category OB005N
3 suppliers33 claims230 services$281.54 avg. paid by Medicare
Parenteral nutrition supply kit; premix, per day B4220
Other-Enteral and Parenteral · category OB005N
4 suppliers35 claims237 services$8.06 avg. paid by Medicare
Parenteral nutrition administration kit, per day B4224
Other-Enteral and Parenteral · category OB005N
4 suppliers35 claims237 services$25.18 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MARTA BATUS MD
Internal Medicine (Medical Oncology)
1725 W HARRISON ST, SUITE 809
CHICAGO, IL 60612
Cook County (312) 563-2487
KM WILLIAMS MD SC
Clinic/Center (Ophthalmologic Surgery)
1725 W HARRISON ST, STE 910
CHICAGO, IL 60612
Cook County (312) 622-7320
KENNETH M BOYER M.D.
Pediatrics (Pediatric Infectious Diseases)
1725 W HARRISON ST, SUITE 710
CHICAGO, IL 60612
Cook County (312) 942-3034
RUSH UNIVERSITY MEDICAL CENTER
Internal Medicine (Hematology)
1725 W HARRISON ST, SUITE 1010
CHICAGO, IL 60612
Cook County (312) 942-5904
DAVID ANSELL M.D.
Internal Medicine
1725 W HARRISON ST, SUITE 263
CHICAGO, IL 60612
Cook County (312) 942-6700
MIDWEST NEUROPSYCHIATRIC ASSOC LTD
Specialist
1725 W HARRISON ST, SUITE 744
CHICAGO, IL 60612
Cook County (312) 942-0118
JANICE DIESCHBOURG M.D.
Radiology (Diagnostic Radiology)
1725 W HARRISON ST, SUITE 155
CHICAGO, IL 60612
Cook County (312) 563-3269
AFFILIATED UROLOGISTS, LTD
Specialist
1725 W HARRISON ST, SUITE 762
CHICAGO, IL 60612
Cook County (312) 563-3447

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Demeo's NPI number?

The NPI number for Mark Demeo is 1972549327. It was assigned to this individual provider in the NPPES registry on June 22, 2006.

Where is Mark Demeo located?

Mark Demeo practices at 1725 W Harrison St Suite 207, Chicago, IL 60612. The listed phone number is (312) 942-5861.

What is Mark Demeo's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Mark Demeo enrolled in Medicare?

Yes. Mark Demeo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Mark Demeo accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Mark Demeo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mark Demeo affiliated with any hospitals?

According to CMS data, Mark Demeo is affiliated with Copley Memorial Hospital, Rush Oak Park Hospital and Rush University Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Demeo was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.